Electrical computers and digital processing systems: multicomput – Network-to-computer interfacing
Reexamination Certificate
2001-11-21
2009-11-24
Blair, Douglas B (Department: 2442)
Electrical computers and digital processing systems: multicomput
Network-to-computer interfacing
C709S233000
Reexamination Certificate
active
07624197
ABSTRACT:
A physical layer of a first network device is connected to cable of an Ethernet network. A digital signal processor (DSP) is connected to the cable. The DSP receives and decodes first signals on the cable from a second device. The DSP codes and transmits second signals to the second device on the cable. An autonegotiation controller is connected to the DSP and includes a cable detector that determines a first number of pairs of twisted pair wires of the cable that are operable. The autonegotiation controller also includes a speed adjuster that masks an advertised speed of the first device when the cable detector determines that the first number is less than the number required for a requested speed of the first device.
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Blair Douglas B
Marvell International Ltd.
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